Cross drum boiler



Dec. 26, 1933. P. R. CASSIDY cRoss DRUM BOILER Original Filed April 2, 1928 2 Sheets-Sheet l i V \\\\\\\\\\\\\\\\\\"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\Y INVENTOR ATTORN EYS Dec. 26, P, R CASSlDY CROSS DRUM BOILER Original Filed April 2, 1928 2 Sheets-Sheet 2 10g n "N Fig- INYENTOR r J/M W ATTORN EYJ Patented oa.- ze, i933 raras .SP1 1 rar f olflilcl citoss DRUMBOILER Perry R. Cassidy, Shcrt'Hills, N. J., *assigner to The Babcockv e Wilcox Company,.vlztayonne,` N. J., a-corporationof New Jersey appacatiennpii 2, 192s, serial No. 266,517 :Renewed .lune 4V, i932 ,y s claims. (ci. 12a-2.55)

This invention relates to a cross drum boiler ythat has a plurality of steam and water drums,

Y andVV will be understood from the description in other.

` headers- 7 being downtake'headers.

connection wththe accompaanying drawingsv in which Fig. i is a vertical section Vthrough an illustrative embodiment of the invention, and Fig. 2 is a section along the line 2 2 of Fig. 1,

In the drawings reference character indicates ofthe uptake headers to the drums, these nipples extending into the drum Yto adist'ance above the K' v a row of substantially straight and vertically exf tending alternating uptake and downtake head- `ers arranged side byiside vand connected'v to eachl normal water level therein and being curved outwardly, as indicated at ll). l

Rows of inc linedtubes 11 constituting banks of tubes connect the lower portions of the downtake headers on one side to theupper portions of u uptake headers on the other side, these rows ofA due to slagging of the tubes.

`tubes alternating and crossing eachother with a few of the lower tubes in each row spacedr farther apart than the others to decrease trouble 7 are stepped wherethe tubes enterk thesanie,

and are straight along the remaining portions sothat the vupper ends of the downtake headers Y and the'lower ends of the uptake headers have 'E respective sides.

straight sides. Nipples 12 connect the lower ends of thefheaders 6 and 7 to mud drums l3`o'n the The headers le and tubes 15 leading therefrom are portions of a circulatory Y irlY and the economiser and are connected 'to thev system between the drums 5 and the walls of the.

furnace, not shown. f f

An economiser is located in the space between the drums 5. Feed water inlet pipe 18 enters the header 19 from which rows of tubes 20 provided with return bends 21 lead to an upperv Yheader22, these tubes and headers constituting the economiser. Tubes 23 lead from the header 22 to the drums 5.

The drums 5 are provided with dry plates 25v in the steam space thereof and connections 26 lead from the space above the dry plates 25 to superheater inlet headers 27 kon opposite sides ofthe boiler. U-tubes 2 8 extend from the headers 27 into the space between the banks of tubes superheater `outlet headers 29,. from which outlets 30 Vlead to a steam main. The v superheater tubes 28 may be supported byfmeans of piers '31,' that rest upon the upper tubes of the banks ll.

The drums 5 may be provided with equalizing connections 32 between the steam spaces thereof, and equalizing connections 32' between the water spaces thereof. These connections 32 and 32 The headers 6 and are preferably'located outside of the boiler setting asindicated in the drawings.

Hot products of combustion fromthefurnace 33 below the'tubes ll pass upwardly in a single pass across the inclined tubes ll, superheater tubes 28 and economizer tubes 25, and thence "pass out through the outlet 34 to the stack.

Water that enters the drums v5 from'the economiser passes downwardly through the nipples 8 the drum, from which the steam goes to thesuperheater and thence to thermains. o

I claim: i. In a boiler, parallel steam'and'water drums,

drum by nipples, Va'ndlrows'of inclined tubes Ycon-A necting the headers connected to one drum' to vthose connected to the other drum, the upper ends of the nipples connectingdsaid .uptake head- -ers to saidv drums extending above thev normal water level in'said drums.

2. In a water tube steam boiler having but one rectilinear gas pass, an exhaust gas ue -at Aone end ofthe gaspass, a boiler setting, Va steam and water drum located along each of two-opposite sides of the flue and' at thetopof the boiler setting, a bank of economizer tubes located-'between said' drums and extending across the gas-pass, a bank of steam superheater tubes extending across the gas Apass and-located below the economizertubes, a boiler furnace having'walls located'at one end of thesetting, opposite gas pass wall portionsA formed by a plurality 'of Aparallel and aligned upright headers locatedabovethe furnaceand below the respective drums, separate direct connections between each header andthe drum directly above '.it, and boiler tubes directly connecting corresponding headers of said opposite wall'. portions so .that alternate headers in I each wall portion'conduct fluid in adirection'reverse to the direction of the fluid flow in the adjacentY headers,'the'direct connections from the luptake headers terminating above the normal water level of the drum. Y

3. In awater tube steam boiler having but `one rectilineargaspass, a boilerY setting, a'furnacegas chamber having walls at one end of thel setting, an exhaust gas fiuev at'theppposite end of the setting, parallel andaligned uptake and downtake headerslocated sol as to constitute substantially an extension of a wall of said chamber, a second set of similarly arranged headers constituting substantially an extension of the opposite wall of said chamber, two steam and water drumsv located on opposite sides of the flue and arranged respectively above said sets of headers, cross circulators connecting the drums below their water levels, a direct connection between each header and the drum above it, boiler tubesdirectly connecting corresponding headers of the opposite sets, banks of superheater tubes located in the gas pass above said boiler tubes, and banks of economizer tubes located in the flue and between said steam and water drums, the direct connection from each uptake header terminating above the normal water level of its drum.

4. In a water tube steam boiler, a steam and Water drum, a boiler furnace, a plurality of closely adjacent upright headers located side by side and positioned beneath the said drum so as to form a wall of a gas pass, direct connections between the tubes of alternate headers and the drum to conduct water to the headers from the drum, uptake connections terminating above the normal water level in the drum and directly connecting the remaining headers to the drumto discharge steam and water into the drum, boiler tubes communicating with the headers and exposed externally to gases from the furnace to provide for the fluid movement above indicated, and a bank of superheater tubes extending transversely of the boiler tubes and located at the level of said connections, said superheater tubes being arranged as loops extending into the gas pass from opposite sides of the boiler.

5. In a water tube steam boiler, a steam and water chamber, walls forming a'gas pass, a plurality of alternately arranged uptake and downtake headers located side by side so as to form substantially a continuation of said passageway, direct downtake connections between the downtake headers and the steam and water chamber to discharge water into the headers, uptake connections terminating above the normal water level in said chamber and directly connecting the remaining headers to the chamber, upwardly and downwardly inclined boiler tubes communicating with the headers and exposed externally tothe furnace gases to provide for the fluid movements above indicated, and a superheater consisting of tube loops extending into the gas 'pass from the opposite sides adjacent the side along which the headers are arranged, said superheater tubes extending into the gas pass at the level of the uptake and downtake connections.

6. In a water tube steam boiler installation having but one rectilinear gas pass, an exhaust v gas flue at one end of the gas pass, a boiler setting, a steam and water drum located along each of two opposite sides of the flue and at the top of the boiler setting, a bank of economizer tubes located between said drums and extending across the gas pass at the level of the drums, a bank of steam superheater tubes extending across the gas pass and located below the econornizer tubes, a boiler furnace having a wall located at each end of the setting, opposite gas pass wall portions formed by a plurality of parallel and aligned uptake and downtake headers located in rows above the furnace and below the respective drums, separate direct uptake and downtake connections between each header and the drum directly above it, and boiler tubes directly connecting corresponding headers on said opposite wall portions so that alternate headers in each wall portion conduct fluid in a direction reverse to the direction of the uid flow in the adjacent headers, said uptake connections terminating above the normal water levels of the drums.

7. In a water tube steam boiler installation having but one rectilinear gas pass, a boiler setting, a furnace gas chamber having walls at the lower part of the setting, an exhaust gas flue at the upper part of the setting, parallel and aligned uptake and downtake headers located so as to constitute substantially an extension of a wall of said furnace gas chamber, a second set of similarly arranged uptake and downtake headers constituting substantially an extension of the opposite wall of said furnace gas chamber, a steam and water drum located on opposite sides of the :due and arranged respectively above each of said sets of headers, a direct uptake connection between each uptake header and the drum above Ait terminating above the normal water level of theV drum, downtake connections directly connecting each of the remaining headers with the drum above it, boiler tubes directly connecting corresponding headers of said opposite sets so that a downtake header of one set is directly connected to an uptake header of the opposite set, banks of superheater tubes located in the gas pass above said boiler tubes and at the level of said connections, and banks o economiser tubes located in the flue and at the levels of said steamy and water drums.

8. In a water tube steam boiler, a boiler setting, affording but one gas pass, a rst steam and water drum along the top of one wall of the setting, a second steam and water drum along the top of the opposite wall of the setting, alternately arranged uptake and downtake headers forming an upright gas pass wall below each drum, horizontally inclined steam generating tubes extending from each downtake header to a corresponding uptake header inthe opposite gas pass wall, downtake nipples directly connecting each downtake header with thedrum above it and terminating below the normal water level of the drum, uptake nipples directly connecting each uptake header with the drum above it and terminating above the normal water level of the drum, a water tube wall header near eachrow of headers, connections leading directly from l'Zal each wall header to the drum above it, cross' i* f circulators connecting the drumsbeneath their water levels, a superheater consisting of tube loops extending into the gas pass from the sides of the setting adjacent one of the header'walls and located on the level of the nipples, superheater supports located'at an elevation below nipples and rows or inclined tubes connecting the 1 headers connected to one drum to those connected to the other drum, the upper ends of the nipples connecting said uptake headers to said drums extending to a level higher than the upper ends of the downtake nipples.

PERRY R. CASSIDY. 

